共查询到19条相似文献,搜索用时 406 毫秒
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提出了一种基于ARM和FPGA的数字微镜器件(DMD)驱动波形实验平台的设计,该设计由数字微镜驱动器和电压转换器两部分构成。阐述了数字微镜驱动器和电压转换器的硬件工作原理,以及ARM微控制器和FPGA的软件工作流程。实验结果表明,该系统能够达到预计的设计要求。 相似文献
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针对微机电系统(MEMS)近红外光谱仪中MEMS微镜驱动系统的耦合与复杂扰动问题,提出了一种基于扰动观测器(DOB)与模型预测控制(MPC)的复合控制结构。通过分析MEMS微镜的驱动工作原理,建立MEMS微镜偏转角与驱动电压的传递函数模型,设计了MPC以消除系统耦合,通过分析系统扰动模型,设计了DOB实现对系统内部与外部扰动的集中监测。仿真研究与实验测试结果表明:基于DOB MPC复合结构的MEMS微镜驱动控制系统,既可以有效抑制系统的外部扰动,又可以抑制由模型失配和变量耦合导致的内部扰动。 相似文献
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为了满足永磁驱动器在实际运行中具有较大的输出转矩和较小的涡流损耗的目的,建立了永磁驱动器的3维有限元模型,分析了永磁驱动器的主要结构参数对输出转矩和涡流损耗的影响。采用正交实验设计方法,获得了用于非线性永磁驱动器建模的样本空间。采用支持向量机建立永磁驱动器的非线性回归模型,并用多目标微粒群算法进行永磁驱动器的结构参数多目标优化,得到了最优结构参数解。有限元仿真实验对比优化前后永磁驱动器的涡流密度和受力分布的结果,验证了该优化方法用于永磁驱动器结构参数优化是可行的。优化结果使永磁驱动器可在涡流损耗较小的情况下获得较大的输出转矩,从而进一步提高系统的工作效率。 相似文献
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介绍了一种平面线圈型电磁驱动的MEMS微驱动器,基于分段磁路的网络方程法,针对微电磁驱动器所采用的平面线圈的结构特点,比较了考虑磁动势的分布效应和传统的集总处理两种方法所建立的平面线圈微驱动器的非线性磁路模型.实验结果表明考虑线圈绕组半径不同而产生的分布效应可以为平面线圈型微驱动器建立可靠的模型,便于定量分析微驱动器结构物理参数对于磁通分布和电磁力的影响,从而为进一步优化设计该微电磁驱动器提供了理论分析依据. 相似文献
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A laser beam scanning system consisting of a scanning micro-mirror and a varifocal micro-mirror is fabricated for laser beam
sensing with variable beam diameter. The scanning micro-mirror is operated under the resonant oscillation condition with an
electrostatic comb-drive actuator. The varifocal micro-mirror is driven by a bending moment generated at the circumference
of mirror with a parallel-palate electrostatic actuator. The scanning micro-mirror and the varifocal mirror are fabricated
on a silicon on insulator wafer. The rotational angle of 9° at 766 Hz is obtained at the voltage of 300 V. The spot size of
the laser beam is adjusted from 0.5 to 3.5 cm at the distance of 43 m by changing varifocal voltage. The proposed scanning
system can be useful for several sensing techniques. 相似文献
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On a tunable bistable MEMS-theory and experiment 总被引:6,自引:0,他引:6
A tunable micromechanical bistable system is presented in this paper. It consists of a long slender micromechanical beam attached to an actuator. The beam is subjected to a transverse force at the middle and a residual stress developed during fabrication. The actuator generates a force along the axial direction of the beam, and is shared by the beam and springs of the actuator. If the total axial load on the beam is compressive and exceeds a critical value, then the beam buckles along the transverse direction and it has two possible equilibrium states. Thus, the actuator and beam together become a bistable system. An analytical model is presented to characterize the system. The model is based on the first mode of buckling of the beam. The model accounts for the elastic axial shortening of the beam and the nonlinear coupling between the beam and actuator. The main result of this paper is a closed-form relation between the transverse force and corresponding equilibrium transverse displacement of the beam for a given actuator force. An experimental micromechanical device is designed and fabricated to verify the theoretical model. Excellent correspondence is found between theory and experiment, as if the experimental device emulates the mathematical model, which is an important result of this paper, since now experimental studies, both quasi-static and dynamic, of bistable systems are possible, which are otherwise difficult to conduct with macrosystems. Several examples of possible applications of the bistable system are provided, including digital sensing of physical parameters 相似文献
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Numerical simulation of a polysilicon thermal flexure actuator 总被引:6,自引:3,他引:3
An electrothermal equation of a polysilicon thermal flexure actuator is presented, which takes heat conduction, air convection
and radiation into account. A numerical method is developed to solve the equation. The deflection model based on the matrix
displacement method, i.e. finite element method (FEM) in structural mechanics, is given. It transforms deflection equations
into a matrix and is easy to calculate numerically. Simulation results for the actuator with typical dimensions are presented.
Discussions are finally given.
Received: 28 April 2000/Accepted: 9 January 2001 相似文献
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José de Jesús Rubio Jaime Pacheco J. Humberto Pérez-Cruz Francisco Torres 《Neural computing & applications》2014,24(2):277-285
In this paper, the structural, sensor, and actuator mathematical models of a transelevator are presented; after, the mathematical model with sensor and actuator of the transelevator is obtained by using the combination of the above mentioned mathematical models. The proposed mathematical model is validated comparing the simulation results against the experimental results. Finally, the stability analysis of the aforementioned model is studied. 相似文献
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José de Jesús Rubio Javier Serrano Maricela Figueroa Carlos F. Aguilar-Ibañez 《Neural computing & applications》2014,24(3-4):573-581
In this paper, the dynamic model with sensor and actuator for the articulated robotic arm is obtained by using the combination of the structural, the sensor, and the actuator dynamic models. The proposed approach is validated comparing the simulation results against the experimental results. 相似文献
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应用电磁感应的基本原理,设计了一种新型的车辆主动悬架用电磁直线执行器,该执行器具有响应快,出力大和动行程大的特点。通过两种不同的建模手段,即有限元建模和集总元件动力学建模的电磁力仿真对比分析,两者基本吻合,表明了执行器模型的准确性。利用所建立的有限元模型,研究了执行器结构参数如气隙厚度和次级铜层厚度对电磁力的影响规律,并选取合理的参数进行执行器的样件试制。通过对加工后的样机模型进行电磁力响应的试验测试,并分别与有限元模型和集总元件动力学数学模型进行相应的比较,试验数据与仿真结果基本一致,进一步验证了模型的准确性。 相似文献